炮掘工作面在贯通前(),必须停止一个工作面作业,做好调整通风系统的准备工作。
A.20m
B.30m
C.50m
参考答案:A
--- Where do you think ______ he ______ the computer?
--- Sorry. I have no idea.
A.has; bought
B.不填; bought
C.did; buy
D.不填; buys
“逸笔”说出自()。
A.钱选
B.王世贞
C.倪瓒
D.刘道醇